21205291225

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{229}}^1\times {\mathrm{1481}}^1$

素因数の和:1822

約数の個数: 48

約数和(自身を含む): 27515582640

約数和(自身を除く): 6310291415

約数列:

[1, 5, 25, 41, 61, 205, 229, 305, 1025, 1145, 1481, 1525, 2501, 5725, 7405, 9389, 12505, 13969, 37025, 46945, 60721, 62525, 69845, 90341, 234725, 303605, 339149, 349225, 451705, 572729, 1518025, 1695745, 2258525, 2863645, 3703981, 8478725, 13905109, 14318225, 18519905, 20688089, 69525545, 92599525, 103440445, 347627725, 517202225, 848211649, 4241058245, 21205291225]

約数ペア:

[(1, 21205291225), (5, 4241058245), (25, 848211649), (41, 517202225), (61, 347627725), (205, 103440445), (229, 92599525), (305, 69525545), (1025, 20688089), (1145, 18519905), (1481, 14318225), (1525, 13905109), (2501, 8478725), (5725, 3703981), (7405, 2863645), (9389, 2258525), (12505, 1695745), (13969, 1518025), (37025, 572729), (46945, 451705), (60721, 349225), (62525, 339149), (69845, 303605), (90341, 234725)]